I'm glad you bring this up! I tend to make a few if any notes whenever I read or listen to an audiobook. Writing notes feels like I'm slowing down, but then I don't remember much about a book months and years later if I don't have anything written about it. I've been trying to make it a habit to write notes or at least write a few thoughts down while I'm reading. I love reading books, but I'm finding that I am slowing down the number of books to get more out of each one. Do you have a format you follow when you do make notes?